Nautel power module

[Studio1]

Hi folks,

Have a Nautel power module here, part no. NAA27/03

Can anyone tell me what it's out of, and its actual function. Is it a power supply or a PA module?

If it's a PA, can you tell me the specs?

I've googled extensively and can't find anything.

 

[Dale H. Cook]

From the model number it is probably a modulater/power amp from one of the AMPFET AM transmitters. When I get a chance I can have a look at a few that I installed years ago to see what they are using.

 

[Bengalsfan]

It is indeed a modulator/power amp out of an AMPFET power module. I have one sitting next to me waiting to be replaced and it is a NAA25B. Screw terminals at the bottom, three inductors at the top?

 

[Dale H. Cook]

Which transmitter is it from? I was thinking an ND1 or an ND5 (which use the same modules).

 

[frankberry]

Why not call Nautel and ask?

 

[Studio1]

Why not call Nautel and ask?

Because I'm in New Zealand and Nautel I presume is in the US, so it's a toll call and one that I'd have to make in the middle of the night..
Just thought I'd ask on here as I knew someone would have the info about it.

 

[VelvetR]

Because I'm in New Zealand and Nautel I presume is in the US, so it's a toll call and one that I'd have to make in the middle of the night..
Just thought I'd ask on here as I knew someone would have the info about it.

Here's a link to Nautel's support service. 24/7; link includes international phone number: 902.823.5100

http://www.nautel.com/support/contact-customer-technical-support/

You'll likely have to find proper country code, Nautel is in Canada (Nova Scotia).

 

[RadioFan2J3]

Country code for Canada is 1, same as the US.

 

[Kent T]

PA/Modulator out of a Nautel ND 1 or 5 transmitter if I recall correctly.

 

[RF_Warrior]

Hi folks,

Have a Nautel power module here, part no. NAA27/03

Can anyone tell me what it's out of, and its actual function. Is it a power supply or a PA module?

It's the RF power module out of an FM4 or FM7, circa 1995.

If it's a PA, can you tell me the specs?

It contains four power amplifier sections, each using an MRF151G dual MOSFET, capable of a nominal 300W. It's got one input at 50ohms - input power is determined by frequency, but nominally 25-30W, and four outputs, each also tuned for 50 ohms. Power supply is variable - it controls the output power, to a maximum of 48VDC.

If you need additional details, let me know - I'll need the transmitter serial number to verify version, as we used a couple of different input and output tuning boards in the PA stages through the production cycle of that module. That way I can be sure I'm getting you the correct information.

Best,

Jeff

 

[Kent T]

Jeff,

Thanks for the definitive answer. Nautel in my opinion makes the best solid state transmitters of all. And your current prices are superior.